Type-whiter



A. C. ROEBUCK L A. l. PRUSZYNSKI.

TYPE WRITER.

APPLICATION FILED 1AN.21 1914.

Patented Aug. 1, 1916.

2 SHEETS-SHEET l.

. 1 5 1M. n 1,1 l\ 111 000 1 M A 1 y 11111 4 1 1 111111111111 11111111 1 O1-,...1, -1 m r1nu111 -f 1./11r11 m u H 1 ,1 1 1% 1111111 m Q ,1W 1 1 pi m |1 l, 311 .M u 11111111 1@ 1 u 111, ,WJ WW1 M" 1 4W 1 11 ./1.,

& A. J. PRUSZYNSKI A. C'. ROEBUCK TYPE WRITER.

APPLICATION FILED IAN. 2, 1914.

2 SHEETS-SHEET Z.

Patented Aug. 1

11K i o ALVAH C. ROEBUCK AND ADOLPT-I J. PRUSZYNSKI, OF WOODSTOCK, ILLINOIS.

TYPE-WRITER.

specification f Letters Patent.

Application filed January 2, 1914. Serial No. 809,853.

Z 1o all whom 'it may concern.'

Be it known that we, ALVAH C. ROEBUGK and ADOLPH J. PnUszrNsKI, citizens of the United States, residing at Woodstock, in the county of McHenry land State of llinois, have invented certain new and useful Improvements in Type-Writers, of which the following is a specification.

rlhis invention relates to typewriters and more particularly to line lock and release mechanism therefor.

rThe principal object of the invention is to provide improved mechanism of this class which is simple in construction and is eilicient in operation.

The invention consists in the features of novelty in the construction, combination and arrangement of the several parts generally shown in the accompanying drawings and described in the specification, but more yparticularly pointed out in the appended claims.

In the drawings: Figure 1'is a sectional view taken on the line 1, 1 of Fig. 2, showing our invention as applied to a typewriter machine; Fig. 2 is a rear elevation of the same, parts being broken away for clearness; Fig. 3 is a view similar to Fig. 1, showing the line lock release key depressed; Fig. 4 is a detail sectional view taken on the line 4, 4 of Fig. 1; Fig. 5 is a. detail perspective view of the adjustable line lock engaging member. Fig. 6 is a detail View showing the line'lock link and bail in one position, and Fig. 7 is a detail view showing the link and bail in another position.

ln the operation of a typewriter, means' must be provided for attracting the attention of the operator when the carriage or platen of the typewriter approaches the end of 'a line and for locking the key levers when the carriage reaches a predetermined point so that the type bars will be no longer operative.

In the present exemplification of the in.- vention, the numeral 10 designates generally a typewriter frame, and 1.1 a top plate secured to the frame. Mounted for movement transversely of the top platev is a carriage, which supports a notched bar 12 adjacent the rear of the machine. Adjustably mounted upon the bar 12 is a line lock actuator 13, provided with a pivoted engaging bell crank 14. The bell crank has a depending engaging arm and a weighted horizontal arm, and the movement of the weighted arm in the downward direction is limited bythe pin 14a; The kactuator 13 is adjustable upon the bar 12 by means of a. pivoted lever 15, one end of which is adapted to engage the notches of the bar and the other end of which is provided with a spring 16 tending to press the opposite end of the lever into engagement with the notches of the bar 12.

Pivoted upon the rear of the top plate 11 is a lever 17 with an upwardly extending extremity 18, carrying a pin 19 and adapted to be engaged by thedepending end of the bell crank 14 when the actuator 13 is moved lwith the bar 12 to a position to engagethe upwardly extending extremity. To the other end of the lever 17 is connected a link 20, which is held in place by means of a flat spring 21 connected to the lever 17 and hold ing the upper end of the link 20 in engagement with a pivot pin 22 projecting from the side of the lever 17. The lower end of this link 20 is provided with a slot 23, and a bell crank 24, pivoted to the frame 10, carries a pin 25 adapted to engage in the slot 23, so that the movement of the lever 17 is communicated to the bell crank 24. The

slot 23 provides for a loose connection of the bell crank 24 with thelink 20, and a spring 26 connected at one end to the pin 25 and at the other end to a pin 27 projecting from the side of the link 20 tends to draw the bell crank to the upper end o'f the slot. Pivotally connected to the lower end of the bell crank 24 is a link 28, which extends tol Patented Aug. 1,1916.

Vto prevent its disengagement from the link,

the pin being freely movable in all portions of the triangular slot. The horizontal end of the L-shaped slot in the end'of the ylink i 28 is formed with an enlarged portion 29,

which is sufliciently large to permit the headed end of the pin 37 to be inserted through it for assembling the structure.' In

ordinary operation, the bail 31 is" not moved' rearwardly to such an extent as to register the pin 37 with the enlarged portion of the slot 29a. 'IIhe limit of the movement of the pin in the horizontal portion of the slot is clearly shown in Fig. 7. t 7

A line lock release lever 38 is also pivotally mounted at the front of the machine and is provided with an extremity 39, which extends immediately vbeneath the link 28.-

Thisrelease lever is inserted through a4 slot in a front guide plate 40, and a spring 41 attached to the lever and to a pin 42 secured to the lfra-me of the machine tends to draw they lever upwardly against the slot ,in the guide plate 40, thereby limiting the rotation of the lever. The guide plate 40 is formed withv a projection 43 andthe lever-38 is' formed with a corresponding projection 44, which is adapted to 'engage the projection 43 in the downward movement of the lever to. limit the movement thereof in this direction. In order to limit the movement of the bail 31 in the direction of the spring 35,

the lever 38Mis formed with a lateral pro- Ijection 45, which bears against lthe rear of lo ne of the sides of thebail 31.

. Connected to the linkv 28 is one end of a coil spring 46, the other end of which is connected tothe projection'42, and the spring tends to draw the link downwardly and rearwardly. This spring 46 is connected to the link at thel forward end, and the tendency ofthe spring is to draw the triangular slot so that the pin 31 will be disposed in the vertical portion 30 of the slot, as seen ,in

In order to attract the attention of the operator before the linelock mechanism is actuated, a. signal is provided comprising a bell 47 mounted on a support at the rear of the machine, and a clapper 48 pivotally mounted preferably upon the axis of the lever 17 with an upwardly extending arm 49, having a projection which is adapted to engage the depending extremity of the bell crank 14 of the line lock actuator. A flat l spring 50 engages a projecting portion 5.1 of

-the Well known manner.

the clapper 48 and tends to hold it in the position clearly shown by Fig. 2, in which the extremity 49 is in position to engage the depending portion of the bell crank 14. In the ordinary operation ofthe machine, the bar 12 is carried with the platen from right to left, as viewed from the rear ofthe machine, as shown by Fig. 2, so that the extremity of the bell crank engages the bell clapper before the line lock mechanism is actuated. l

In the ordinary operation of the machine, the link 28 is in the full line position, as shown by Fig. 1, with the pin 37 in the vertical portion 30 of the slot. The engagement of the pin 19 of the lever 17 with the depending extremity of the bell crank 14 causes an upward movement of the link 20 and a turning movement of the bell crank 24, whereby the link 28 will be thrust forward to the dotted line position shown in Fig. 1, carrying with it the bail 31 to the dotted line position shown in this figure. In the full line position in Fig. 1, the bail will not engage the depending projection 34 ofthe key levers 32, but in the dotted line position this projection 34 will be engaged yand the downward movement of the key levers 32 will be limited to such an extent as to prevent the type bars, with which they are connected, from striking the platen, in In the dotted line positionof Fig. 1, the type bars are locked against actuation and the carriage and platen cannot be moved in the step-by-step feeding direction. In order to permit a further step-by-step movement in the normal feeding direction, the release lever 38 is depressed, as shown by Fig'. 3, in which the forward end of the link 28 ,is raised, thereby causing the L-shaped slot to be moved upwardly with respect to the pin 37, whereby the spring 35 of .the bail draws the bail rearwardly in the position shown by Figs. 3 and 7. In this position, the upper projection 33 of the bail will not engage the .depending portion 34 of the type bar key levers 3`2, and the type bars may thereafter be actuated in the ordinary manner. When the release key 38 is operated the front end of the link 28 is raised so that the pin 37 attached to the bail 31 can slide rearwardly in the horizontal slot, and no further action of the link 28 occurs when the lever 38 is released. The spring 46 isweaker thanthe spring 26 and the spring 26 holds the stud 25 in the top of the slot 23 aga-inst the tension of the spring 46. In case a. key lever is in the downward position at the time the adjustable line lock trip 14 comes in contact with the pin 19 on the lever 17 it would not be possible for the bail 31 to be pushed forward,'in which case the carriage would become locked because the trip 14 could not push 'down the end 18 of the lever 17. But, through the use of the loose spring connection between the vertical length 20 and the bell crank 24:, the end 18 of the "lever 17 can be pushed d ownward by the trip 14, and as soon as the key lever is released by the operator the projection 34 is moved out of the way andthe bail 31 will move forward through the action rof spring 2G. After the line lock has been released, another key lever has been operated and the carriage has traveled another space, the lever 17 will be released so that the end 18 will move upward to ,its normal position, which movement will be brought about by the tension of the spring 46 which pulls the link 28 rearwardly, and as the link 28 moves rearwardly it brings the vertical slot opposite the stud 37 in the line lock bail 31, and' the downward pull of the spring26 will pull the front end of the link 28 downwardly to bring the stud 37 into the top of the vertical slot, yin which position itis again readyto be operated as a line lock.

That we claim is:

1. In line lock and release mechanism, the combination with a movable line-lock actuator, of a lever having a pin adapted to be engaged by the actuator at a predetermined point, a link connected at one end to the lever with a slot at the other end, a bell crank with a pin in one arm adapted to engage in the slot of the link, a spring connecte'd to the pin and to the link tending to draw the bell crank upwardly in the slot, a second link connected to the other arm of the bell crank, a line-lock bail controlled thereby, and a spring Vconnected to the last named link adapted to be overcome by the tension of the other spring.

2. In line lock and release mechanism, the combination with a movable line-lock ictuator, of a lever having a pin adapted to be engaged by the actuator at aA predetermined point, a link connected at one end to the lever with a slot at the other end, a bell crank with a pin in one arm adapted to engage in the slot of the link, a spring connected to the pin and, to the link tending to draw the bell crank upwardly in the slot, a second link connected to the other end' of the bell crank having a slot at its forward end, a pivotally connected line lock bail having a pin freely movable inthe, slot, and a spring tending to draw the last named link downwardly and rearwardly and o-vercome by the pressure of the first named spring.

3. In line lock and release mechanism, the combination with a link having an l.- shaped slot at the forward end, of a pivoted and spring-pressed line-lock bail with a pin movable in the slot, means to actuate the link to move the bail, and a release key pivoted above the link having a projection adapted to engage the link on its under side to raise it and to permit the movement of the pin in the slot for releasing the bail.

t. In line lock and release mechanism, the combination with a slotted link, of means for moving the link longitudinally, a pivoted line-lock bail having a pin movable in the slot, means tending to draw the bail out of line-locking position, and a release key adapted to engagethc link to move the slotted end of the link transversely with a projection for ,limiting the releasing movement of the line-lock bail. l

54 In line lock and release mechanism, the combination with a link having a slot at its forward end, of means for moving the link longitudinally, a pivoted line-lock member with a pin projecting through the slot of the link, means tending to draw the line-lock member rearwardly, and a line-lock release lever having a projection adapted to engage below the link and another projection adapted to engage the rear of the line-lock member to limit the rearward movement thereof in the slot of the link.

G. In line-lock mechanism, the combination with a link having a slot with an enlarged portion, means for moving the link, a line-locking member with a headed pin adapted to be inserted through the enlarged portion of the slot, the head of the pin being smaller than the enlarged portion and larger than the other portion of the slot, means tending to draw the line-locking member in the direction of the enlarged portion of the slot, and means to prevent the pin of the line-lock member from registering with the enlarged portion of the slot.

7. -In line lock and release mechanism, the

l combination with a link having a slot at one end, means connected thereto adapted to move it longitudinally, a portion of the slot being substantially horizontal and a portion substantially vertical, a line-locking member having a pin freely movable in the slot, means tending to draw the member rearwardly, a spring connected to the link tending to draw it downwardly and rearwardly, and a resiliently depressible release lever adapted to raise the slotted end of the link against the pressure of the spring and to limit the rearward movement of the locking member.

S. In line lock and release mechanism for typewriters, the combination of a bail pivotally mounted at the sides of the frame and extending beneath the typewriter key levers, a link connected to the bail, means for moving the link longitudinally to vary the posiwith a projection to engage the lever and' of two subscribing Witnesses, on this 27 th limit its downward movement, and a spring day of December, A. D. 1913.

tending to hold the lever inits upper po- ALVAH C. ROEBUCK. sition against the extremity of the slot in ADOLPH J. PRUSZYNSK. the plate. .Witnessesz In testimony whereof We have signed our N. M. KEATING,

names to this specification, in the presence J. F. SwAHTsTEDT. 

